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Abstract

In the present work a theoretical model for composite materials with a Poisson's ratio v = 0.5 is developed in order to evaluate the mechanical stresses around a single cylindrical elastic fibre inclusion. The model considers a gradual and continuous variation of the longitudinal elastic modulus E_L in the area between matrix and fibre, the former being under hydrostatic pressure p_o · E_L is expressed as a Fermi-Dirac distribution function of important parameters such as the rate of variation of E_L , the extent of the interphase and the fibre volume fraction. Results indicate a strong effect of the above parameters on the stress state developed around the fibre.

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Elastic Interphase with Variable Properties in Fibrous Composites

Abstract

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